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To calculate daily, monthly, and yearly sales in Oracle, you can use SQL queries to aggregate the data from your sales table(s). Here is an example of how you can calculate sales by day, month, and year:

1. Calculate daily sales:

    SELECT TRUNC(sales_date) AS sales_day, SUM(sales_amount) AS daily_sales  
    FROM sales_table  
    GROUP BY TRUNC(sales_date);

This query uses the TRUNC function to truncate the sales_date to the nearest day, and then groups the sales by day using the GROUP BY clause. The SUM function is used to calculate the total sales amount for each day.

1. Calculate monthly sales:

    SELECT TO_CHAR(sales_date, 'YYYY-MM') AS sales_month, SUM(sales_amount) AS monthly_sales  
    FROM sales_table  
    GROUP BY TO_CHAR(sales_date, 'YYYY-MM');

This query uses the TO_CHAR function to format the sales_date as a year-month string, and then groups the sales by month using the GROUP BY clause. The SUM function is used to calculate the total sales amount for each month.

1. Calculate yearly sales:

    SELECT TO_CHAR(sales_date, 'YYYY') AS sales_year, SUM(sales_amount) AS yearly_sales  
    FROM sales_table  
    GROUP BY TO_CHAR(sales_date, 'YYYY');

This query uses the TO_CHAR function to format the sales_date as a year string, and then groups the sales by year using the GROUP BY clause. The SUM function is used to calculate the total sales amount for each year.

You can modify these queries to suit your specific requirements, such as joining multiple tables to include additional data or filtering the results based on specific criteria.

with rollup

Yes, you can use the ROLLUP clause in Oracle to calculate daily, monthly, and yearly sales in a single query. The ROLLUP clause generates subtotal and total values for each specified column, allowing you to calculate the sales at different levels of aggregation. Here's an example of how you can use ROLLUP to calculate sales by day, month, and year:

SELECT TRUNC(sales_date) AS sales_day, TO_CHAR(sales_date, 'YYYY-MM') AS sales_month, TO_CHAR(sales_date, 'YYYY') AS sales_year, SUM(sales_amount) AS sales_total
FROM sales_table
GROUP BY ROLLUP(TRUNC(sales_date), TO_CHAR(sales_date, 'YYYY-MM'), TO_CHAR(sales_date, 'YYYY'))
ORDER BY sales_year, sales_month, sales_day;

This query groups the sales data by day, month, and year using the TRUNC and TO_CHAR functions. The ROLLUP clause generates subtotal and total values for each specified column, allowing you to calculate the sales at different levels of aggregation. The SUM function is used to calculate the total sales amount for each group. The results are ordered by year, month, and day for easier analysis.

Note that the ROLLUP clause generates additional rows for subtotal and total values, so you may need to filter out the unwanted rows using the GROUPING function or a WHERE clause. Also, the ROLLUP clause may generate NULL values for some columns, so you may need to use the NVL function to replace them with appropriate values.